(b) To make the knowledge determination required by paragraph (a) of this section, a railroad shall have procedures for testing a person being evaluated for certification as a signal employee that:

1. (1) Are designed to examine a person's knowledge of:

   1. (i) All applicable Federal railroad safety laws, regulations, and orders governing signal systems and signal-related technology;
   2. (ii) All applicable railroad safety and operating rules; and

   3. (iii) All applicable railroad standards, procedures, and instructions for the installation, operation, testing, maintenance, troubleshooting, and repair of the railroad's signal systems and signal-related technology, including:

      1. (A) The railroad's rules and standards for disabling and removing signal systems from service; and
      2. (B) The railroad's rules and standards for placing signal systems back in service;
2. (2) Are objective in nature;
3. (3) Include a practical demonstration component;
4. (4) Are in written or electronic form;
5. (5) Are sufficient to accurately measure the person's knowledge of the subjects listed in paragraph (b)(1) of this section; and
6. (6) Allow for testing conducted with reference to books and other written materials, as addressed in the railroad's certification program.